diff --git a/src/minimodem.c b/src/minimodem.c
index 4152cbe..7fecddd 100644
--- a/src/minimodem.c
+++ b/src/minimodem.c
@@ -698,6 +698,8 @@ main( int argc, char*argv[] )
     if ( ! sa )
         return 1;
 
+    sample_rate = simpleaudio_get_rate(sa);
+
     if ( rxnoise_factor != 0.0 )
 	simpleaudio_set_rxnoise(sa, rxnoise_factor);